Sunlight disinfection of drinking water

Kljaić, Jelena (2013) Sunlight disinfection of drinking water. Diploma thesis, Faculty of Science > Department of Biology.

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Abstract

Solar water disinfection (SODIS) is a water treatment method that uses UVA irradiation as an instrument for inactivation of bacteria in water. It is based on cheap and easily available tools: PET bottles and sunlight. The main aim of this study was to achieve a log 4 reduction of bacteria. The experiments were either performed with a sun simulator with UVA lamps using 3 different lamp heights to create different UVA intensities or outdoor conditions were applied. Also, influence of dissolved organic substances and different particles on solar disinfection efficiency was observed. The results showed that bacteria in natural water samples were found to be more resistant to sunlight than lab strains. It was also discovered that dissolved organic substances enhanced bacterial growth and produced turbidity which prevented UVA rays to fully penetrate through the sample. From the different filter materials, cotton wool turned out to be the best solution for the reduction of suspended particulate matter.

Item Type: Thesis (Diploma thesis)
Keywords: waterborne diseases, coliforms, UVA light, PET bottles, turbid water samples, filter materials
Supervisor: Fürhacker, Maria
Co-supervisor: Hrenović, Jasna
Date: 2013
Number of Pages: 99
Subjects: NATURAL SCIENCES > Biology
Divisions: Faculty of Science > Department of Biology
Depositing User: Grozdana Sirotic
Date Deposited: 20 Feb 2014 13:04
Last Modified: 22 Sep 2014 11:38
URI: http://digre.pmf.unizg.hr/id/eprint/448

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